HCTZ 12.5 mg / metoprolol succinate 100 mg Extended Release Oral Tablet
RxNorm 866456

Concept Hierarchy & Relationship Mapping

RxNorm Concept Unique Identifier (RxCUI) 866456 represents a standardized clinical drug concept used for cross-system interoperability. This concept aggregates multiple Atom IDs (AUIs), which are specific naming variations and synonyms used across pharmaceutical databases to ensure accurate medication mapping for: HCTZ 12.5 mg / metoprolol succinate 100 mg Extended Release Oral Tablet.

The following semantic concepts and normalized strings are associated with this clinical entity:

SCD
Hydrochlorothiazide 12.5 mg / metoprolol succinate 100 mg Extended Release Oral Tablet
Primary clinical definition
AUI:12348134
View
SY
HCTZ 12.5 mg / metoprolol succinate 100 mg Extended Release Oral Tablet
AUI:6357596
View
TMSY
HydroCHLOROthiazide 12.5 mg / metoprolol succinate 100 mg Extended Release Oral Tablet
AUI:12428661
View

This clinical crossover tool is designed for healthcare professionals, pharmacists, and data analysts to safely compare substitute products and manage medication interoperability.

SCD

Semantic Clinical Drug (SCD):
Hydrochlorothiazide 12.5 mg / metoprolol succinate 100 mg Extended Release Oral Tablet
(Atom ID: 12348134)

Clinical Status & Identity

Prescribable Status
NO (Reference)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
hydrochlorothiazide 12.5 MG / metoprolol succinate 100 MG Extended Release Oral Tablet
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
E
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
866456
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12348134
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SCD
Semantic Clinical Drug (Ingredient + Strength + Dose Form)
Source Code
866456
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
RxNorm Vocabulary (RXNORM)
The official name and abbreviation for the vocabulary source.
Source Version
20AA_260601F
The specific version of the vocabulary provided by the source.
Update Date
June 01, 2026
The date when this RxNorm data was last updated by the NLM.
License Contact
RxNorm Customer Service, , U.S. National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, (888) FIND-NLM, , https://support.nlm.nih.gov/support/create-case/, https://www.nlm.nih.gov/research/umls/rxnorm/
Source licensing contact information.
SY

Synonym (SY):
HCTZ 12.5 mg / metoprolol succinate 100 mg Extended Release Oral Tablet
(Atom ID: 6357596)

Clinical Status & Identity

Prescribable Status
NO (Reference)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
HCTZ 12.5 MG / metoprolol succinate 100 MG Extended Release Oral Tablet
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
E
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
866456
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
6357596
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
SY
Synonym (Synonym of another TTY, given for clarity.)
Source Code
866456
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
RxNorm Vocabulary (RXNORM)
The official name and abbreviation for the vocabulary source.
Source Version
20AA_260601F
The specific version of the vocabulary provided by the source.
Update Date
June 01, 2026
The date when this RxNorm data was last updated by the NLM.
License Contact
RxNorm Customer Service, , U.S. National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, (888) FIND-NLM, , https://support.nlm.nih.gov/support/create-case/, https://www.nlm.nih.gov/research/umls/rxnorm/
Source licensing contact information.
TMSY

Tall Man Lettering Synonym (TMSY):
HydroCHLOROthiazide 12.5 mg / metoprolol succinate 100 mg Extended Release Oral Tablet
(Atom ID: 12428661)

Clinical Status & Identity

Prescribable Status
NO (Reference)
Part of the RxNorm Current Prescribable Content subset including all drugs available for prescription in the USA.
Concept Description
hydroCHLOROthiazide 12.5 MG / metoprolol succinate 100 MG Extended Release Oral Tablet
Official description of the drug concept as defined in the source vocabulary.
Suppress Flag
E
N: Not suppressible | O: Obsolete | Y: Suppressed by editor | E: Unquantified non-prescribable drug.

Interoperability & Coding

Concept ID (RxCUI)
866456
RxNorm Unique Identifier for the standardized concept.
Atom ID (RXAUI)
12428661
Unique identifier for this specific name variation (Atom).
Term Type (TTY)
TMSY
Tall Man Lettering Synonym (Tall Man Lettering synonym of another TTY, given to distinguish between commonly confused drugs.)
Source Code
866456
The "Most useful" identifier asserted by the original source vocabulary.

Source & Registry Data

Source Name
RxNorm Vocabulary (RXNORM)
The official name and abbreviation for the vocabulary source.
Source Version
20AA_260601F
The specific version of the vocabulary provided by the source.
Update Date
June 01, 2026
The date when this RxNorm data was last updated by the NLM.
License Contact
RxNorm Customer Service, , U.S. National Library of Medicine, 8600 Rockville Pike, , Bethesda, MD, United States, 20894, (888) FIND-NLM, , https://support.nlm.nih.gov/support/create-case/, https://www.nlm.nih.gov/research/umls/rxnorm/
Source licensing contact information.